Date derived from presence of road over Monarch Pass, completed 1922, and lack of road up to Mount Blue Sky, completed 1927. Nation-wide system of numbered highways, initiated in 1924, not yet present
note
Date derived from presence of road over Monarch Pass, completed 1922, and lack of road up to Mount Blue Sky, completed 1927. Nation-wide system of numbered highways, initiated in 1924, not yet present
Note
false